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      <title>SpringBean的生命周期 - 交互式测验</title>
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      </style>
    </head>
    <body>
      <div class="main-wrapper">
          <div class="quiz-container">
            <div class="quiz-header">
              <h1>SpringBean的生命周期 - 交互式测验</h1>
              <p>检验你对文档内容的理解程度</p>
            </div>
            <div id="quiz-content">
                <div class="quiz-body">
                    <div class="progress-bar">
                        <div id="progress-indicator"></div>
                    </div>
                    <div id="question-container">
                      <p id="question-text"></p>
                      <ul class="options-list" id="options-list"></ul>
                    </div>
                    <div id="result-container"></div>
                    <div id="hint-container" class="hint-container"></div>
                </div>
                <div class="quiz-footer" id="quiz-footer">
                  <button id="prev-btn" class="nav-btn">上一题</button>
                  <button id="hint-btn" class="nav-btn" style="background-color: #ffc107; color: #333; box-shadow: 0 4px 12px rgba(255,193,7,0.3);">提示</button>
                  <button id="next-btn" class="nav-btn">下一题</button>
                </div>
            </div>
          </div>
      </div>

      <script>
        const quizData = [
  {
    "question": "根据文档，Spring Bean生命周期的正确顺序是什么？",
    "options": [
      "实例化 -> 初始化 -> 属性设置 -> 使用 -> 销毁",
      "实例化 -> 属性设置 -> 初始化 -> 使用 -> 销毁",
      "属性设置 -> 实例化 -> 初始化 -> 使用 -> 销毁",
      "实例化 -> 属性设置 -> 使用 -> 初始化 -> 销毁"
    ],
    "correctAnswerIndex": 1,
    "explanation": "Spring容器首先通过构造函数或工厂方法创建Bean的实例（实例化），然后为其依赖的属性进行注入（属性设置），接着调用初始化回调方法（初始化），之后Bean就可以被应用程序使用，最后在容器关闭时被销毁。",
    "source": "文档中「生命周期阶段」部分",
    "hint": "文档中明确列出了五个核心阶段，思考一下依赖注入（属性设置）和自定义初始化逻辑（初始化）哪个先发生？"
  },
  {
    "question": "在一个Bean中，使用`@PostConstruct`注解的方法会在哪个时间点被调用？",
    "options": [
      "在Bean的构造方法执行之后，但在属性注入完成之前。",
      "在Bean的属性注入完成之后，但在Bean准备好被使用之前。",
      "仅在Bean第一次被应用程序代码调用时。",
      "在Spring容器关闭，Bean即将被销毁之前。"
    ],
    "correctAnswerIndex": 1,
    "explanation": "`@PostConstruct`注解用于标记一个初始化方法。根据生命周期流程，该方法会在Bean实例化和属性设置（依赖注入）都完成之后被调用，用于执行自定义的初始化逻辑。这确保了在执行初始化代码时，所有的依赖都已就绪。",
    "source": "文档中「生命周期回调方法」部分",
    "hint": "这个注解的作用是“构造之后”，但这里的“构造”不仅仅指实例化，还包括了准备好所有必要的属性。"
  },
  {
    "question": "关于`Prototype`（原型）作用域的Bean，以下哪个描述是正确的？",
    "options": [
      "Spring容器会缓存一个原型Bean的实例，并共享给所有请求方。",
      "每次请求时，Spring容器都会创建一个新的Bean实例，并负责其完整的生命周期，包括调用销毁方法。",
      "它是Spring Bean的默认作用域。",
      "Spring容器在创建并交付原型Bean后，便不再管理其后续的生命周期，因此不会自动调用其销毁方法。"
    ],
    "correctAnswerIndex": 3,
    "explanation": "对于原型作用域的Bean，Spring容器只负责创建、配置和组装。一旦将Bean实例交给客户端代码后，容器就不再跟踪它了。因此，像`@PreDestroy`或`destroy-method`指定的销毁回调方法将不会被容器自动调用。",
    "source": "文档中「Bean的作用域」部分",
    "hint": "文档中提到“原型Bean的生命周期由Bean的使用方管理，容器不会对其进行管理和销毁。”"
  },
  {
    "question": "`BeanPostProcessor`接口的`postProcessBeforeInitialization`和`postProcessAfterInitialization`方法，与Bean自身的初始化方法（如`@PostConstruct`注解的方法）的执行顺序是怎样的？",
    "options": [
      "Bean的初始化方法首先被调用，然后是`postProcessBeforeInitialization`，最后是`postProcessAfterInitialization`。",
      "首先调用`postProcessBeforeInitialization`，然后是Bean自身的初始化方法，最后是`postProcessAfterInitialization`。",
      "首先调用`postProcessAfterInitialization`，然后是Bean自身的初始化方法，最后是`postProcessBeforeInitialization`。",
      "`BeanPostProcessor`的两个方法都在Bean实例化之前执行。"
    ],
    "correctAnswerIndex": 1,
    "explanation": "`BeanPostProcessor`提供了一个在Spring容器初始化Bean时插入自定义逻辑的钩子。其`postProcessBeforeInitialization`方法在任何Bean初始化回调（如`@PostConstruct`或`init-method`）之前被调用，而`postProcessAfterInitialization`则在这些初始化回调完成之后被调用。",
    "source": "文档中「BeanPostProcessor接口」部分",
    "hint": "从方法名`BeforeInitialization`和`AfterInitialization`可以推断出它们与“Initialization”阶段的关系。"
  },
  {
    "question": "在Spring中，为一个Bean配置延迟初始化（Lazy Initialization）的主要目的是什么？",
    "options": [
      "确保该Bean在所有其他Bean之后才被销毁。",
      "提高应用程序的启动性能，仅在首次需要时才创建该Bean实例。",
      "将该Bean的作用域自动更改为`Prototype`。",
      "强制该Bean在容器启动时以最高优先级被创建。"
    ],
    "correctAnswerIndex": 1,
    "explanation": "默认情况下，单例Bean在Spring容器启动时就会被创建。对于一些资源密集型或不常使用的Bean，这会拖慢启动速度。延迟初始化（如使用`@Lazy`注解）可以让容器在启动时不创建该Bean，而是在第一次从容器请求它时才进行实例化，从而优化启动性能。",
    "source": "文档中「Bean的延迟初始化」部分",
    "hint": "文档提到：“延迟初始化可以提高应用程序的性能，特别是当应用程序包含大量的Bean或者某些Bean只在特定条件下被使用时。”"
  },
  {
    "question": "当一个`@Configuration`类被`@Lazy`注解标记时，会产生什么效果？",
    "options": [
      "该配置类本身会被延迟加载，但其中定义的Bean仍然会立即初始化。",
      "该配置类中定义的所有`@Bean`方法都将被默认配置为延迟初始化。",
      "该配置类将不会被Spring容器扫描和加载。",
      "只有标记为`@Scope(\"prototype\")`的Bean会受影响。"
    ],
    "correctAnswerIndex": 1,
    "explanation": "当`@Lazy`注解应用于一个`@Configuration`类时，它会级联影响到该配置类中通过`@Bean`方法定义的所有Bean。这些Bean都将默认采用延迟初始化的策略，即在首次被请求时才会被创建。",
    "source": "文档中「Bean的延迟初始化」部分",
    "hint": "思考一下，对一个“配置工厂”本身进行延迟设置，会对它的“产品”产生什么影响？"
  },
  {
    "question": "在Bean的生命周期中，哪个阶段最适合执行数据库连接池的初始化或加载配置文件等资源密集型操作？",
    "options": [
      "实例化阶段（构造方法中）",
      "属性设置阶段",
      "初始化阶段（例如在`@PostConstruct`方法中）",
      "销毁阶段（例如在`@PreDestroy`方法中）"
    ],
    "correctAnswerIndex": 2,
    "explanation": "初始化阶段是执行资源准备工作的理想时机。在这个阶段，Bean的所有依赖项都已经被注入（属性设置完成），可以安全地使用它们来建立连接、加载资源等。在构造方法中执行这些操作为时过早，因为依赖可能尚未注入。",
    "source": "文档中「Bean生命周期的应用场景」部分",
    "hint": "文档中“初始化资源”场景下提到了“数据库连接、资源加载、初始化配置等”操作。"
  }
];
        console.log("Quiz Data:", JSON.parse(JSON.stringify(quizData))); // 添加这行用于调试，以可展开的JSON格式输出
        
        let currentQuestionIndex = 0;
        let score = 0;
        // 存储每个问题的回答状态
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        const optionsListEl = document.getElementById('options-list');
        const resultContainerEl = document.getElementById('result-container');
        const quizContentEl = document.getElementById('quiz-content');
        const progressIndicatorEl = document.getElementById('progress-indicator');
        const prevBtn = document.getElementById('prev-btn');
        const nextBtn = document.getElementById('next-btn');
        const hintBtn = document.getElementById('hint-btn');
        const hintContainerEl = document.getElementById('hint-container');

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          optionsListEl.innerHTML = '';
          hintContainerEl.style.display = 'none'; // 隐藏提示
          
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            showFinalScore();
            return;
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            li.textContent = optionText;
            li.dataset.index = index; // Store index in a data attribute
            // 如果这道题已经回答过，恢复状态
            if (userAnswers[currentQuestionIndex] !== null) {
                if (index === userAnswers[currentQuestionIndex]) {
                    li.classList.add('selected');
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            optionsListEl.appendChild(li);
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          // 如果已经回答过，直接显示结果
          if (userAnswers[currentQuestionIndex] !== null) {
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          updateNavigationButtons();
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        function selectOption(optionIndex) {
            userAnswers[currentQuestionIndex] = optionIndex;
            const currentQuestion = quizData[currentQuestionIndex];
            const isCorrect = optionIndex === currentQuestion.correctAnswerIndex;

            // 重新计算分数
            score = userAnswers.reduce((acc, answer, index) => {
                return answer === quizData[index].correctAnswerIndex ? acc + 1 : acc;
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            showResult(isCorrect, currentQuestion);
            updateNavigationButtons();
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            nextBtn.style.display = 'block';
            hintBtn.style.display = 'block'; // 显示提示按钮

            prevBtn.disabled = currentQuestionIndex === 0;
            nextBtn.disabled = false; // 最后一题时，下一题按钮不禁用，而是用于显示报告
            nextBtn.textContent = (currentQuestionIndex === quizData.length - 1) ? '查看报告' : '下一题';
            
            // 如果当前问题没有提示，则禁用提示按钮并隐藏提示内容
            if (!quizData[currentQuestionIndex].hint) {
                hintBtn.disabled = true;
                hintContainerEl.style.display = 'none';
                hintContainerEl.textContent = ''; // 清除旧的提示内容
            } else {
                hintBtn.disabled = false;
            }
        }

        function showResult(isCorrect, questionData) {
            resultContainerEl.innerHTML = ''; // 清空之前的结果
            const resultBox = document.createElement('div');
            resultBox.className = `result-box ${isCorrect ? 'correct' : 'incorrect'}`;
            
            let html = `<h3>${isCorrect ? '回答正确！' : '回答错误'}</h3>`;
            if (!isCorrect) {
                html += `<p><strong>正确答案是：</strong> ${questionData.options[questionData.correctAnswerIndex]}</p>`;
            }
            html += `<div class="explanation-text">${questionData.explanation}</div>`;
            html += `<div class="source-text">来源: ${questionData.source}</div>`;
            
            resultBox.innerHTML = html;
            resultContainerEl.appendChild(resultBox);

            // 禁用所有选项的点击事件，并高亮正确/错误答案
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                child.style.pointerEvents = 'none';
                // 高亮正确答案
                if (index === questionData.correctAnswerIndex) {
                    child.classList.add('correct'); // 需要添加CSS样式
                    child.style.backgroundColor = '#d4edda';
                    child.style.borderColor = '#c3e6cb';
                }
                // 如果选错了，高亮错误选项
                if (!isCorrect && index === userAnswers[currentQuestionIndex]) {
                    child.classList.add('incorrect'); // 需要添加CSS样式
                    child.style.backgroundColor = '#f8d7da';
                    child.style.borderColor = '#f5c6cb';
                }
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        }

        function goToNextQuestion() {
            if (currentQuestionIndex < quizData.length - 1) {
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                loadQuestion();
            } else {
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            }
        }

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            if (currentQuestionIndex > 0) {
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                loadQuestion();
            }
        }
        
        function showHint() {
            const currentQuestion = quizData[currentQuestionIndex];
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                hintContainerEl.textContent = currentQuestion.hint;
                hintContainerEl.style.display = 'block';
            } else {
                hintContainerEl.style.display = 'none';
            }
        }

        function showFinalScore() {
            document.querySelector('.quiz-body').style.display = 'none';
            document.getElementById('quiz-footer').style.display = 'none';

            const correctCount = score;
            const totalQuestions = quizData.length;
            const answeredCount = userAnswers.filter(a => a !== null).length;
            const wrongCount = answeredCount - correctCount;
            const skippedCount = totalQuestions - answeredCount;
            const accuracy = totalQuestions > 0 ? Math.round((correctCount / totalQuestions) * 100) : 0;
            const errorRate = totalQuestions > 0 ? Math.round((wrongCount / totalQuestions) * 100) : 0;

            const finalScoreHtml =
                '<div class="final-score-container">' +
                '<h2>答题报告</h2>' +
                '<div class="score-summary">' +
                '<div class="score-card">' +
                '<h3>得分</h3>' +
                '<p>' + correctCount + ' / ' + totalQuestions + '</p>' +
                '</div>' +
                '<div class="score-card">' +
                '<h3>正确率</h3>' +
                '<p>' + accuracy + '%</p>' +
                '</div>' +
                '<div class="score-card">' +
                '<h3>错误率</h3>' +
                '<p>' + errorRate + '%</p>' +
                '</div>' +
                '<div class="score-card score-details">' +
                '<table>' +
                '<tr><td>正确</td><td>' + correctCount + '</td></tr>' +
                '<tr><td>错误</td><td>' + wrongCount + '</td></tr>' +
                '<tr><td>未答</td><td>' + skippedCount + '</td></tr>' +
                '</table>' +
                '</div>' +
                '</div>' +
                '<div class="report-actions">' +
                '<button id="review-btn">回顾测验</button>' +
                '<button class="primary" onclick="location.reload()">再试一次</button>' +
                '</div>' +
                '</div>';

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            if (reportEl) {
                reportEl.remove();
            }
            quizContentEl.insertAdjacentHTML('beforeend', finalScoreHtml);
            document.getElementById('review-btn').addEventListener('click', reviewQuiz);
        }

        function reviewQuiz() {
            const reportEl = document.querySelector('.final-score-container');
            if (reportEl) {
                reportEl.remove();
            }

            document.querySelector('.quiz-body').style.display = 'block';
            document.getElementById('quiz-footer').style.display = 'flex';
            
            currentQuestionIndex = 0;
            loadQuestion();
            updateNavigationButtons(); // Ensure nav buttons are correctly displayed
        }

        // Event Delegation for options
        optionsListEl.addEventListener('click', (event) => {
            if (event.target && event.target.matches('li.option-item')) {
                // Check if the question has already been answered
                if (userAnswers[currentQuestionIndex] === null) {
                    const selectedIndex = parseInt(event.target.dataset.index, 10);
                    selectOption(selectedIndex);
                }
            }
        });

        prevBtn.addEventListener('click', goToPreviousQuestion);
        nextBtn.addEventListener('click', goToNextQuestion);
        hintBtn.addEventListener('click', showHint);
        
        // 初始加载
        loadQuestion();
      </script>
    </body>
    </html>
  